H04B 3/56
Circuits for coupling, blocking, or by-passing of signals
H04B3/56 (Circuits for coupling, blocking, or by-passing of signals) appears on 963 US grants and 913 published applications in this corpus.
Search patents in H04B- Granted patents
- 963
- Published applications
- 913
- Assignees
- 415
- Inventors
- 1,264
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 3 | 0 |
| 1979 | 3 | 0 |
| 1980 | 4 | 0 |
| 1981 | 1 | 0 |
| 1982 | 5 | 0 |
| 1983 | 2 | 0 |
| 1984 | 5 | 0 |
| 1985 | 4 | 0 |
| 1986 | 4 | 0 |
| 1987 | 5 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 5 | 0 |
| 1994 | 1 | 0 |
| 1995 | 4 | 0 |
| 1996 | 6 | 0 |
| 1997 | 6 | 0 |
| 1998 | 6 | 0 |
| 1999 | 13 | 0 |
| 2000 | 7 | 0 |
| 2001 | 8 | 4 |
| 2002 | 5 | 17 |
| 2003 | 14 | 26 |
| 2004 | 12 | 32 |
| 2005 | 24 | 54 |
| 2006 | 41 | 35 |
| 2007 | 29 | 28 |
| 2008 | 31 | 31 |
| 2009 | 13 | 29 |
| 2010 | 29 | 28 |
| 2011 | 25 | 23 |
| 2012 | 28 | 28 |
| 2013 | 18 | 30 |
| 2014 | 26 | 34 |
| 2015 | 40 | 40 |
| 2016 | 49 | 82 |
| 2017 | 70 | 67 |
| 2018 | 77 | 79 |
| 2019 | 97 | 68 |
| 2020 | 86 | 61 |
| 2021 | 47 | 32 |
| 2022 | 23 | 29 |
| 2023 | 24 | 17 |
| 2024 | 24 | 19 |
| 2025 | 21 | 13 |
| 2026 | 4 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Low frequency communication system over power lines18 Aug 2026US 12,712,595 B2Myers Emergency Power Systems LLC
- Circuit structure to improve reliability of power line communication10 Mar 2026US 12,574,072 B2HK Oceancomm Technology Co., Limited
- Systems, devices and methods for detection and/or prevention of power line communication17 Feb 2026US 12,556,300 B2S.G.A. Innovations Ltd.
- Method and apparatus to enable communication and control in a power system10 Feb 2026US 12,549,220 B2Solaredge Technologies Ltd.
- Serial daisy-chained bus power for serial daisy-chained communication system11 Nov 2025US 12,468,654 B2Analog Devices, Inc.
- Energy transmission and communications system with remote communications interface9 Jul 2026US 2026/0192707 A1Conductix, Inc.
- Power-Over Data Line Communication Device and Power-Over Data Line Communication System9 Jul 2026US 2026/0197208 A1Astemo, Ltd.
- Active inductive impedance enhancement circuit applied to power line path2 Jul 2026US 2026/0189213 A1HK Oceancomm Technology Co., Limited
- Apparatus for managing solar modules2 Jul 2026US 2026/0189262 A1Hanwha Solutions Corporation
- Transmitter unit and method for coupling an electrical transmission signal into a dc voltage line9 Apr 2026US 2026/0100683 A1SMA Solar Technology AG
Most cited
By later US patents
- Millimeter-wave surface-wave communications708US 8,897,697 B1AT&T Intellectual Property I, L. P. · 2014
- Using an electric power cable as the vehicle for communicating an information-bearing signal through a barrier655US 8,253,516 B2AT&T Intellectual Property I, L. P. · 2012
- Backhaul link for distributed antenna system604US 9,113,347 B2AT&T Intellectual Property I, L. P. · 2015
- Quasi-optical coupler578US 9,209,902 B2AT&T Intellectual Property I, L. P. · 2015
- Transmission medium having multiple cores and methods for use therewith526US 9,490,869 B1AT&T Intellectual Property I, L. P. · 2016